My neurologist, Dr. Eric Pioro of the Cleveland Clinic has a list of 'supplements' that he recommends that persons with ALS add to their diet.

One of these is CREATINE......

I take this on a fairly regular basis adding it to my Carnation Instant Breakfast as an example.

The following is an excerpt from an article on wiki>>>

http://en.wikipedia.org/wiki/Creatine

"Creatine has been demonstrated to cause modest increases in strength in people with a variety of neuromuscular disorders.^[31] Creatine supplementation has been, and continues to be, investigated as a possible therapeutic approach for the treatment of muscular, neuromuscular, neurological and neurodegenerative diseases (arthritis, congestive heart failure, Parkinson's disease, disuse atrophy, gyrate atrophy, McArdle's disease, Huntington's disease, miscellaneous neuromuscular diseases, mitochondrial diseases, muscular dystrophy, and neuroprotection), and depression.^{[32][citation needed]}

A study demonstrated that creatine is twice as effective as the prescription drug riluzole in extending the lives of mice with the degenerative neural disease amyotrophic lateral sclerosis (ALS, orLou Gehrig's disease). The neuroprotective effects of creatine in the mouse model of ALS may be due either to an increased availability of energy to injured nerve cells or to a blocking of the chemical pathway that leads to cell death.^[33] A similarly promising result has been obtained in prolonging the life of transgenic mice affected by Huntington's disease. Creatine treatment lessened brain atrophy and the formation of intranuclear inclusions, attenuated reductions in striatal N-acetylaspartate, and delayed the development of hyperglycemia.^[34]"

Currently,  I use  >>>  http://www.amazon.com/gp/product/B002DYIZEY/ref=wms_ohs_product?ie=UTF8&psc=1

Optimum Nutrition Creatine Powder

Nutrition Information

Micronized Creatine Powder At a Glance: Made With Creapure Creatine Monohydrate No fillers or additives     Milligrams of creatine: 5,000

One serving of Optimum Nutrition Creatine provides a full 5 grams (5,000 milligrams) of 99.9 percent pure Creapure brand creatine monohydrate. The production method used to produce this creatine yields a tasteless, odorless powder that mixes easily into water or juice and does not readily settle to the bottom. As a result, the gritty taste or texture you may have experienced with other creatine powders is not associated with this product.Quality Counts: GMP Certified Products
Optimum Nutrition's commitment to quality is evident throughout the entire product development process. As a continued measure of quality, all vendors must provide a Certificate of Analysis for each raw material supplied. The certified analyses are also verified through random in-house and independent laboratory testing. To further diminish any chance of physical, chemical, and microbiological contaminants, ON has established and implemented a Hazard Analysis Critical Control Point (HACCP) program. Quality assurance professionals make routine checks on all storage, blending, and production areas and conduct daily inspections.
ON is proud that its in-house manufacturing operation has been registered under the NSF International, The Public Health and Safety Company, Good Manufacturing Practices (GMP) Program. Together, these practices and procedures allow ON to consistently deliver first-rate sports nutrition supplements under the strictest quality control standards.

About Optimum Nutrition: True Strength
Since 1986, Optimum Nutrition has been supporting the nutrition goals of elite athletes and goal-driven individuals around the world. Building on a foundation of company owned and operated production facilities, unparalleled manufacturing expertise, and uncompromising quality standards, ON continually strives to bring athletes and active individuals sports nutrition solutions designed to make a real difference in performance. Whether your goals involve strength, speed, power, endurance - or any combination - ON supplements work as hard as you do. Realize your True Strength with the quality and innovation leader.
What's in the Box
Optimum Nutrition Creatine Powder, 1,200 grams.

Product Description

Creatine Powder by Optimum Nutrition 1200 grams Powder

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I am not necessarily endorsing this particular product.  Before I make a purchase, I take the time to research the item until I find one that suits my needs the best.  THEN I shop around for the best price...

amazon is often the winner as they have a wide selection of items,  often the shipping is free,  the prices are very competitive and I can usually expect to receive my order in a day or two...at my doorstep without having to spend the energy, time, lack of availability  and $$ that comes with going to town to shop.